卫星海洋环境监测预警全国重点实验室为增进学术交流，促进实验室对外开放，组织系列“海星系列学术讲座”，邀请国内外知名专家与青年科研人员分享前沿科学动态，讨论最新学术成果，欢迎大家踊跃参加。

召集人：何贤强 研究员

会议地点：1号楼1210

会议时间：7月7日周二 14:30—16:00

报告人：Palanisamy Shanmugam 教授 印度理工学院

报告题目：Complexity of irradiance reflectance distribution in turbid and productive waters

报告人简介：Palanisamy Shanmugam, Professor and National Geospatial Chair Professor at the Indian Institute of Technology (IIT) Madras, graduated from the Centre for Geoscience and Engineering, College of Engineering, Anna University in 2003, then worked at the Korea Ocean Research and Development Institute (KORDI) as the visiting scientist and later became the expert scientist at KORDI during 2003-2008, and joined as the Assistant Professor at IIT Madras in 2008, became Associate Professor in 2010 and Professor in 2014. 

Based on his scientific and research contributions in marine remote sensing and geospatial technology, he was appointed as the National Geospatial Chair Professor in 2018 by the Ministry of Science and Technology. 

He was a visiting professor at the Ocean Optics Laboratory, University of South Florida in 2010, and is a regular visiting Ocean-Star Professor at SOED since 2017.

Prof. Shanmugam is a known expert in the field of marine optical remote sensing and satellite oceanography. He has deep attainments in atmospheric correction and water color information inversion. His main research interests include optics of natural waters, water color remote sensing, radiation transmission model, satellite oceanography, and underwater imaging. Applications are generally focused on the coastal and ocean environments and impact assessments among other related topics. 

Over the past two and half decades, he has made outstanding contributions in marine optics and remote sensing and published over 170 journal papers and supervised over 20 PHDs.

报告摘要：Subsurface irradiance reflectance fields especially in turbid and productive waters has important applications in ecology, engineering and optical remote sensing. This presentation focuses on exploring many possible causes of variation in the proportionality factor f and analysing its effect on the subsurface irradiance reflectance in different waters. Accordingly, a new model was developed to account the variation of f factor with respect to the absorption coefficient (a), backscattering coefficient (bb), incident illumination condition, and other wavelength-depth dependent factors. The new model was tested for five water types with varying turbidity and chlorophyll contents. Model results were verified with in situ measurements data and compared with the results from the existing models. The model performance is superior because it includes new parameterizations for the proportionality factor, which were not accounted in other models. Knowledge related to the interrelationships between the inherent optical properties and apparent optical properties can be used to study the variability and distribution of subsurface reflectance in homogeneous and stratified coastal waters.